That's not exactly DRY, since there is a boolean test twice on request.POST.
Python is about being explicit and easy to read, not about being short and obscure - that sort of stuff is what Perl handles :) Therefore, I would prefer the first code block.
For more, please refer to the Zen of Python - type "import this" in your python shell.

Achievements

82
Karma

0
Total ProTip Views

Forked 100

Have a seriously badass project that's been forked at least 100 times

Walrus

The walrus is no stranger to variety. Use at least 4 different languages throughout all your repos

Forked 50

Have a project with a thriving community of users that's been forked at least 50 times

Lemmings 100

Write something great enough to have at least 100 watchers of the project

Forked 20

Have an established project that's been forked at least 20 times

Python 3

Have at least three original repos where Python is the dominant language

Forked

Have a project valued enough to be forked by someone else

Python

Would you expect anything less? Have at least one original repo where Python is the dominant language